Mapping Waste Before the Cleanup: State of the Map 2018 in Milan

State of the Map brought the OpenStreetMap community to Politecnico di Milano for three days of talks, workshops, debates, mapping, and technical exchange. The programme moved between the practical details of data quality and the larger social question behind an open map: who can describe the world, maintain that description, and use it to act?

I participated from the perspective of World Cleanup Day. At the time, the initiative was preparing a coordinated civic action across 150 countries. That scale produced a specific design problem. A global campaign could carry one date and one identity, but the waste itself remained stubbornly local. It appeared beside a road, on a beach, in a drainage channel, behind a market, or across an island that outsiders might never see.

The conference made sense as the place to present this problem because OpenStreetMap already understood that global infrastructure can be assembled from local knowledge. The map was more than a background image for the campaign. It was a possible meeting place for observation, coordination, software, and civic responsibility.

The official conference archive preserves our slide deck under the title MapIt: Global Trash Hunt. It credits me alongside Kadri Maripuu and carries the visual language of World Cleanup Day 2018: one day, 150 countries, and millions of volunteers acting together for a cleaner planet.

The presentation moved quickly, as conference talks often must. It introduced the ambition of World Cleanup Day, linked the work to the United Nations Sustainable Development Goals, and then focused on the gap between environmental harm and public perception. We used the phrase trash blindness for the condition in which waste becomes so familiar that people stop noticing it as information.

That phrase contained the core interaction challenge. A person has to recognize a site, understand what should be recorded, locate it accurately, submit useful information, and trust that the record can support a later action. The quality of the map depends on the clarity of every one of those steps.

Environmental campaigns often begin with awareness, but awareness alone does not tell a cleanup team where to go. A mapped observation can become operational. It can help volunteers identify a location, estimate a task, organize a route, compare areas, contact a municipality, or return later to see whether the situation changed.

The presentation showed this through examples from different places. In Tanzania, waste could connect to blocked drainage, flooding, and disease. In Indonesia, the geography of more than seventeen thousand islands made a centralized approach unrealistic. Beaches, settlements, local authorities, and volunteer groups required different paths into the same system.

OpenStreetMap offered a shared geographic language, while the surrounding World Cleanup Day tools had to translate that language into participation. Mapping competitions, community groups, local partnerships, and the World Cleanup app were all attempts to make the act of recording waste feel accessible enough to become ordinary.

Placing a marker on a map looks simple. The surrounding system is not. What counts as a waste point? How precise should the location be? Should the person upload a photograph, estimate volume, identify material, or describe access conditions? Who verifies the report? What happens when several people map the same site? Which information is useful to volunteers, and which information is useful to a municipality?

These are interaction design questions because they determine whether people can convert concern into reliable action. They are also governance questions because every field, category, and permission creates a model of responsibility. A system can invite participation while still producing data that is too vague, inconsistent, or isolated to support the next step.

The presentation did not claim to have solved the entire chain. Its value was to place the chain in public view. The map, the app, the volunteer, the cleanup organization, and the local authority had to be treated as parts of one service rather than separate products.

World Cleanup Day could communicate a singular global gesture, but implementation required local interpretation. The same interface could not assume identical devices, connectivity, mapping literacy, waste categories, municipal structures, or volunteer cultures in every country.

This tension is visible in the slide deck. The ambition is monumental, while the examples are concrete and uneven. One place needs a direct line to municipal services. Another needs a playful competition to build mapping habits. Another needs remote volunteers to help trace data before local teams can act on the ground.

The lesson has remained durable: scale comes from a system that can preserve a shared purpose while allowing different communities to enter through different doors. A global product becomes credible when local people can recognize their own conditions inside it.

The Milan presentation now belongs in the HAAM archive because it reveals a continuity in my work. The visible artifact was a talk about waste mapping, but the deeper subject was the construction of trust across interfaces, communities, technical standards, and public action.

HAAM's present language around performance, accessibility, sustainability, evidence, and institutional memory developed later. State of the Map already contained the same pressure. A civic system had to work for people with different levels of expertise. It had to remain useful under real conditions. It had to carry information across organizations. It had to make a public promise and preserve enough structure for others to participate in keeping it.

The enduring value of the event is therefore larger than conference attendance. It records a moment when mapping, environmental action, and product design converged around one practical question: how can a shared description of the world help people take responsibility for it?